<template>
    <div class="login_container">
        <div class="login_box">
            <!-- 头像区域 -->
            <div class="avatar_box">
                <img src="../assets/logo.png" alt="">
            </div>
            <!-- 登陆表单区域 -->
            <el-form ref="loginformRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_from">
                <!-- 用户名 -->
                <el-form-item prop="username">
                    <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user">

                    </el-input>
                </el-form-item>
                <!-- 密码 -->
                <el-form-item prop="password">
                    <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type="password">

                    </el-input>
                </el-form-item>
                <!-- 按钮区域 -->
                <el-form-item class="btns">
                    <el-button type="primary" @click="login">登陆</el-button>
                    <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form>
        </div>
    </div>
</template>

<script>
export default {
    data(){
        return{
            //这是登陆表单的数据绑定对象
            loginForm:{
                username:'',
                password:''
            },
            //这是表单验证规则对象
            loginFormRules:{
                //验证用户名是否合法
                username:[
                    { required: true, message: '请输入登陆用户', trigger: 'blur' },
                     { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                ],
                //验证密码是否合法
                password:[
                    { required: true, message: '请输入用户密码', trigger: 'blur' },
                     { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
                ]
            }
        }
    },
    methods: {
        //点击重置按钮，重置登录效果
        resetLoginForm(){
            // console.log(this)
            this.$refs.loginformRef.resetFields()
        },
        login(){
            this.$refs.loginformRef.validate( async valid=>{
                // console.log(valid);
                if(!valid) return;
                const {data:res} = await this.$http.post('login',this.loginForm);
                // console.log(res);
                if(res.meta.status == 200){
                    this.$message.success("登陆成功")
                    // console.log("登陆成功");
                }else{
                    this.$message.error("登陆失败")
                    // console.log("登陆失败")
                }
                //1.将登陆成功之后的token，保存到客户端的sessionStorage中
                //  1.1项目中除了登陆之外的其他API接口，必须在登陆之后才能访问
                //  1.2token只应在当前网站打开期间生效，所以将token保存在sessionStorage中
                // console.log(res);
                window.sessionStorage.setItem("token",res.data.token)
                //2.通过编程式导航跳转到后台主页，路由地址是/home
                this.$router.push("/home");//页面跳转
            })
        }
    },
}
</script>



<style lang="less" scoped>
    .login_container{
        background-color: #2b4b6b;
        height: 100%;
    }
    .login_box{
        width:450px;
        height: 300px;
        background-color: #fff;
        border-radius: 3px;
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%,-50%);
    }
    .avatar_box{
        height: 130px;
        width: 130px;
        border: 1px solid #eee;
        border-radius: 50%;
        padding: 10px;
        box-shadow: 0 0 10px #ddd;
        position: absolute;
        left:50%;
        transform: translate(-50%,-50%);
        background-color: #fff;
    }
    .avatar_box img{
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #eee;
    }
    .btns{
        display: flex;
        justify-content:flex-end;
    }
    .login_from{
        position: absolute;
        bottom: 0;
        width:100%;
        padding: 0 20px;
        box-sizing: border-box;
    }
</style>